*** This project is no longer supported, the arduino code is outdated and no longer works, my arduino broke so I can't fix it, if you have a fix feel free to PM me! ***

Its an arduino project, creating a temperature measurer, with a thermistor, and outputs to an lcd display

Plug the thermistor in A0 through 5v
and follow the schematic, to hook up the lcd...

Parts list:
1,  2X16 white on black LCD
1, 10k Thermistor
1, Variable Resistor
1, Breadboard
1, 10k resistor
1, Arduino ( I use UNO)
1, 9v battery (Optional)
1, DC plug adaptor for 9v battery (Optional)

Here's the code

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

double Thermister(int RawADC) {
 double Temp;
 Temp = log(((10240000/RawADC) - 10000));
 Temp = 1 / (0.001129148 + (0.000234125 * Temp) + (0.0000000876741 * Temp * Temp * Temp));
 Temp = Temp - 273.15; // Convert Kelvin to Celcius

 return Temp;

void setup() {



void loop() {
 Serial.println(int(Thermister(analogRead(0)))); // display Fahrenheit


lcd.print(" degress C");



I need your help;; in my project simply i have to read analod values ,amplify it and have to display on the lcd but my serial monitor and lcd are showing different values..please help.
Blueray03 (author)  pjparthjoshi1 year ago
Could you upload the code you're using to http://pastebin.com/ ?
jeybcdefg1 year ago
same here.. when i verify the program, it says that "Lcd crystal does not name a type".. what to do guys?..
Dylon1242 years ago
hi, can you help me your code says lcd. was not declared in this scope. what should I do?
adagio152 years ago
Mine predicted global warming......
It reads 351*C All the time....
I didnt have an LCD Screen handy at the time, so I changed the code to send it to serial....
What have I done wrong??
I'm not the author, but maybe I can help. Can you post the code you are using?

Did you miss this line: "Temp = Temp - 273.15;" To convert from Kelvin to Celsius?
Freddy_1003 years ago
I can not find the list of parts used. Or how to build it. Could you help out a little more. Looks like a good project.
Blueray03 (author)  Freddy_1003 years ago
Sorry about that, the parts list is up now along with a more clear diagram...
moogbeatz994 years ago
never mind i didnt know the math library was automatically included, but not actually in the libraries folder
moogbeatz994 years ago
i cant seem to find where to download the math library, could you send me the link?